CVE-2026-31608
Description
In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-31608
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-31608.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/84ff995ae826aa6bbcc6c7b9ea569ff67c021d72
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/830de6eeb9db4cb7e758201fb99328ef4ca4b032
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/6968c91fab05b8fc4d6700e0cf34472bb422df25
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/2ba03f46132b0d1a7bafb86e1ef61951a2254023
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.14-1 |
| debian | sid | fixed | 6.19.14-1 |
| debian | trixie | fixed | 0 |
| linux-kernel | affected | 6.18.24 |
References
- https://git.kernel.org/stable/c/2ba03f46132b0d1a7bafb86e1ef61951a2254023
- https://git.kernel.org/stable/c/6968c91fab05b8fc4d6700e0cf34472bb422df25
- https://git.kernel.org/stable/c/830de6eeb9db4cb7e758201fb99328ef4ca4b032
- https://git.kernel.org/stable/c/84ff995ae826aa6bbcc6c7b9ea569ff67c021d72
- https://www.suse.com/security/cve/CVE-2026-31608.html
- https://security-tracker.debian.org/tracker/CVE-2026-31608
CWEs
CWE-415
Verify integrity in audit chain (admin only). AS-IS.